N-3-oxoalkylamides and-thioamides in synthesis of heterocyclic compounds. 3. Study of cyclization of N-3-oxoalkylthioamides into 5,6-dihydropyridine-2(1H)-thiones
作者:A. S. Fisyuk、M. A. Vorontsova
DOI:10.1007/bf02290614
日期:1998.1
A new route to 5,6-dihydropyridine-2(1H)-thiones
作者:Alexandr S. Fissyuk、Marina A. Vorontsova、Dmitrii V. Temnikov
DOI:10.1016/0040-4039(96)01051-9
日期:1996.7
New 6-acetoxy-5,6-dihydro-4H-1,3-oxazinium perchlorates 2 were synthesized by cyclization of N-3-oxoalkylamides 1. The reaction of 2 with sodium hydrosulfide in methanol or dimethylformamide results in the formation of unknown N-3-oxoalkylthioamides 3. New5,6-dihydropyridine-2(1H)-thiones 4 were prepared by cyclization of 3.